In a paper published in the Proceedings of the Royal Society B, Comeau et al. (2014a) write that in spite of "pessimistic projections forecasting the disappearance of most coral reefs before the end of the current century," a compilation of laboratory studies produced by Chan and Connolly (2013) suggests it is more likely that "coral calcification will decline approximately 10-20% (rather than ceasing) for a doubling of present-day partial pressure of CO2." In addition, they note that "more subtle responses to ocean acidification [OA] have also been shown in recent studies reporting signs of resistance to OA for some reef calcifiers," citing the work of Takahashi and Kurihara (2013), Comeau et al. (2013) and Comeau et al. (2014b). And they add that "field observations at underwater CO2 vents in Papua New Guinea and sites with high seawater pCO2 in Palau have also shown that some reef calcifiers can persist in naturally acidified conditions," referencing the studies of Fabricius et al. (2011) and Shamberger et al. (2014).

In their own study of two coral taxa and two calcifying algae - which they conducted in Moorea (French Polynesia), Hawaii (USA) and Okinawa (Japan) - Comeau et al. found that for three of the four calcifiers "there was no effect of pCO2 on net calcification" at any of the three locations, which led them to suggest that this finding "may represent a constitutive and geographically conserved capacity to resist some of the effects of OA." And, therefore, evidence continues to accumulate in support of the view that the vast bulk of the pessimistic projections of the world's climate alarmists relative to future ocean acidification effects on calcifying organisms will likely never come to pass.